<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="/myTest/script/jquery.min.js"></script>
</head>
<body>
    <p id="p1">Hallo World</p>
    <button id="btn1">button</button>


<script>
    $(document).ready(function () {
        $("#btn1").click(function () {
            $('#p1').text("duang~");
    });
})
</script>
</body>
</html>